Inner ring for pistons



gaimed'Fe-b. i6, i926.

UNITED STA i Annan L. HAMIL'roN;

, sizes.

' INNER RING FOR PISTONS. i

Application led March 9, 1925. Serial No. 13,953.

To all wronaz't mayl concern:

lle it known that I,

a citizen of the Unit Brooklyn, county of ARDEN L. HAMILTON, ed States,residing at Kings, and State of.

New York, have invented a certain new. and

useful Inner Ring for Pistons, followingis a specification.

This invention relates of which the to inner ring adapted to beused inconjunction with the piston rings of' internal combustion engines tobepositioned between the inner circumference of the rings and the basesofthe associated piston grooves. The purposepf an inner ring is tocentralize thefpiston with respect to the cylinder wall to preventlateral play of the piston commonly known as piston slap;

When a piston has lateral play. or slap, it will tilt and the pistonrings will fail to present al proper wiping e to the cylinder wall.

able in worn pistons, is of loil and carbon troubles.

-a loose piston greatly when associated with This defect,inevitfrequently the cause Inner rings bviate these disadvantages.v

' Inner rings are, in

their most convenient form, manufactured in long strips of spring steel`of a width slightly less than the width of the piston groove and, suchstrip material is crimped or bent at spaced distances longitudinally sothat its length is made up of a succession of substantially straight'portions united by relatively shortJ bends.

The mechanic, when usinor the stri cuts n a therefrom the lengths ofmaterial desired from time to time as Inasmuch as occasion may require.

it is difficult to accurately measure the circumference of the baseofthe piston' groove and accurately apply it the strip material, themechanic roughly estimates the length required and then cuts off a pieceof the strip somewhat longer than necessary, thereafter proceeding tofit the strip tothe piston groove by successive l ly cutting off shortlengths until the proper length is obtained.

It isthe object of this come this tiresome and slow method of fitting..v

Speaking generally, bodies'a strip of springA the invention emsteel bentto form a succession of relatively straight portions an at least one endof which strip is graduated and marked according togdiferent piston Thatis tosay the strip and mark 0 I start at one end of if on the 'stripcertain invention to over-A lengths appropriate to pistons'of differentor BROOKLYN, NEW Yoax.

sizes and each graduation is marked with-a l designation showing thesize of. piston to which that partcular so that a mechanic may readilysee where to cut the strip 1n order to obtain vthe p roper length forany particular piston. This ar'- rangement eliminates wastev inherent inprior practice and enables a quick fitting through obviating loss oftime.

Features of the invention, those specified, will hereinafter detailedpanying drawings.

The v accompanying drawings illustrate one practical embodiment of theinvention,

but the construction therein shown is to be understood as illustrative,only, and not as the limits of the invention.

defining 1 is a perspective'view showing a Figure length is appropriate,

v Y .05 other than be apparent. lfrom the p description and claims, whenread in conjunction'with the accomportion. of the length of stripmaterial enit bcdying the present .invention and.

Figure 2 shows such material laid out iat and graduated in accordancewith this invention.

In Figure 1 o f the drawings, I have illus-A trated alength of stripmaterial made in accordance with vthis invention andi from this showingit will appear that thestrip is bent tol Aform a succession of -straightpor- 'each of the commonly used sizes I next cal- -culate thecircumference of the base ofeachof said grooves and after havingobtained these circumferential dimensions I equal' distances from atleast one end of the strip and as shown in Figure 2 form on the stripgraduations 2, 3, 4, 5, etc. by stamping,

marking, printing or otherwise delineating line or mark that can be onthe strip a next mark the strip adjacent readily seen'. I

lay olf each of these graduations with the diameter 'of the piston to-which the appropriate. For example, 2 is marked whichl I. havedesignated strip, will properly {it the groovepieten.4 Similarly lengthmark is the graduation if cut from the of the 2H the graduation is 1102H;- showing that the distance i 4 rrooves which that marked 3% showingthat a. piece equal in` length to the distance g Will properly fit apiston 31/8 in diameter.4 I mark upon one end of the strip sufii'cientgraduations to enable a mechanicto fit the pistons of any of the wellknown makes of car having piston particular strip will properly tit. l

In practice, both ends of the strip or only one end of the strip may bemarked and it is frequently found'convenient 'to mark but one end of thestrip and then use this end as a scale by which the other or unmarkedend of the strip, may be measured. In other words, the parts to be usedare cut from the unmarked end 'of the strip, the marked end thereofserving as a scale to show a 'mechanic the 'lengths which he needs forsuccessive jobs. It both ends of the strip are marked the firstl cut maybe made from the marking of one end and proceeding cuts made from thesame end, While employing the .scale at the other endas a gauge.

The drawings show the invention in'its preferred practical form but theinvention is to be understood as fullycommensurate with the appendedclaims.

f Having thus fully described the inven- Lav/agees tion, what I claim asnew and desire to secure by Letters Patent is 1. Inner ring stock'comprising a thin\ strip'of resilient sheet metal, at least one endportion of ywhich strip is provided With graduations'spaced from saidend of the strip distances corresponding to the circumference of thebase of the piston ring grooves `otfpistons vof different sizes, eachofsaid graduations-bearing a. designation in termsl ing designated inaccordance with the piston diameter and spaced -from the end Vof thestrip a distance substantially equal to the circuniference'of the baseof the ring groove of such piston.v

2l. Inner ring stock coml'nismg a strip of spring steel longitudinallycrimped and graduated longitudinally to show the length of materialwhich must be cut from a strip to properly cooperate With a particularpiston size.

In testimony lwhereof I have signed the foregoing specification.

ARDEN L. HAMILTON.

